Closing Line Value (CLV) Calculator

Formula

Example: you bet at 2.10 and the line closed at 1.95 → CLV = (2.10 / 1.95 − 1) × 100 = +7.69%. You locked in odds 7.69% better than the closing price.

This is the fair (odds-ratio) method — it measures how much more your odds pay relative to the closing odds, independent of stake. A positive result means you beat the close.

Why closing line value matters

The closing line is the final set of odds offered just before an event starts. By then the market has absorbed all available information — sharp money, injuries, lineups, weather — making it the most accurate price available. Sharp bookmakers like Pinnacle close within a fraction of a percent of the true probability.

If you consistently bet at odds higher than the eventual close, you are systematically getting prices the market later agrees were too generous. Over a large sample, positive CLV correlates with strong long-term outcomes far more reliably than short-term win/loss results, which are dominated by variance.

This is why professional bettors track CLV as their north-star metric: results take hundreds of bets to stabilise, but CLV tells you almost immediately whether your process is sound. Read more in our guide to closing line value.

How to read your CLV

• Positive CLV (+): you beat the close. Your bet odds paid more than the closing price — the hallmark of a winning long-term process.
• Negative CLV (−): the line closed shorter than your odds. You took a worse-than-market price; repeated, this signals a leak.
• Around 0%: you matched the close. No edge captured, but you didn't overpay either.

One bet's CLV is noisy — track your average CLV across many bets. A consistent average of +2% to +4% beating the close is excellent and usually predicts a profitable record.